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SUSE:SLE-12:Update
xen.950
0003-e1000-fix-access-4-bytes-beyond-buffer-end...
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File 0003-e1000-fix-access-4-bytes-beyond-buffer-end.patch of Package xen.950
From: "Michael S. Tsirkin" <mst@redhat.com> Date: Mon, 12 Jul 2010 20:24:59 +0300 Subject: e1000: fix access 4 bytes beyond buffer end Patch-mainline: v0.13.0-rc0 Git-commit: b0b900070c7cb29bbefb732ec00397abe5de6d73 References: bnc#840196 We do range check for size, and get size as buffer, but copy size + 4 bytes (4 is for FCS). Let's copy size bytes but put size + 4 in length. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Michal Kubecek <mkubecek@suse.cz> --- tools/qemu-xen-traditional-dir-remote/hw/e1000.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/tools/qemu-xen-traditional-dir-remote/hw/e1000.c b/tools/qemu-xen-traditional-dir-remote/hw/e1000.c index c75bc5e..9b062db 100644 --- a/tools/qemu-xen-traditional-dir-remote/hw/e1000.c +++ b/tools/qemu-xen-traditional-dir-remote/hw/e1000.c @@ -659,7 +659,6 @@ e1000_receive(void *opaque, const uint8_t *buf, int size) } rdh_start = s->mac_reg[RDH]; - size += 4; // for the header do { if (s->mac_reg[RDH] == s->mac_reg[RDT] && s->check_rxov) { set_ics(s, 0, E1000_ICS_RXO); @@ -673,7 +672,7 @@ e1000_receive(void *opaque, const uint8_t *buf, int size) if (desc.buffer_addr) { cpu_physical_memory_write(le64_to_cpu(desc.buffer_addr), (void *)(buf + vlan_offset), size); - desc.length = cpu_to_le16(size); + desc.length = cpu_to_le16(size + 4 /* for FCS */); desc.status |= E1000_RXD_STAT_EOP|E1000_RXD_STAT_IXSM; } else // as per intel docs; skip descriptors with null buf addr DBGOUT(RX, "Null RX descriptor!!\n"); -- 1.8.1.4
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